| Popis: |
The synthesis of diorganotincarbohydrates {R2SnL [R = Me, Bu or Oct; L = aldotetrose (erythrose), aldopentoses (arabinose or ribose), ketohexoses (fructose or sorbose), aldohexoses (galactose or glucose) or 6-deoxyaldohexose (rhamnose)]} is reported. Ir and 119Sn Mossbauer spectra are consistent with the presence of tin-carbohydrate oxygen bonds in the compounds and with a trigonal bipyramidal arrangement of two alkyl and three O-containing groups about the tin atoms. The thermal decomposition of the compounds is shown to fall into one of three categories, viz: (1) aldose derivatives that decompose without melting to give SnO as the final tin-containing product, (2) ketose derivatives that decompose without melting to give SnO2 as the final tin-containing product, and (3) aldose derivatives that melt and then decompose to give either SnO or SnO2. |
